# frozen_string_literal: true

module Grape
  module Validations
    module Validators
      class ExceptValuesValidator < Base
        def initialize(attrs, options, required, scope, opts)
          @except = options.is_a?(Hash) ? options[:value] : options
          super
        end

        def validate_param!(attr_name, params)
          return unless params.try(:key?, attr_name)

          excepts = @except.is_a?(Proc) ? @except.call : @except
          return if excepts.nil?

          param_array = params[attr_name].nil? ? [nil] : Array.wrap(params[attr_name])
          raise Grape::Exceptions::Validation.new(params: [@scope.full_name(attr_name)], message: message(:except_values)) if param_array.any? { |param| excepts.include?(param) }
        end
      end
    end
  end
end
